Hate to say it, but it's not really a difference--some of my balls do the SAME thing.

I had one yearling last week who smelled the rats I was handing out, and became convinced that the FURNACE, 5 feet away, was food...and struck toward it repeatedly, lol.

I had a large female that a friend was feeding--she came barreling out of the bin toward him, causing him to scream, jump back, and throw the rat at her. She caught it in mid air. ^_^